Nut-lock.



No. 831,747. PATENTED SEPT 25, 1906. O. J. RUSSELL.

NUT LOOK.

APFLIGATION FILED NOV. l8 1905.

au uc ntoz 0. (I flzwseii M human-o OREN J. RUSSELL, OF PORTSMOUTH, OHIO, ASSIHN i.- Ol ONE-HALF TO A. L, TEST, OF PORlSh'IOU"l-i, Stilt).

Specification of Letters Patent.

Patented Sept. 25, 1906.

Application filed November 18.1905. Serial No. 288,005.

To all whom, it may concern: 7

Be it known that I, OREN J. RUSSELL, a citizen of the United States, residing at Portsmouth, in the county of Soioto and State of Ohio, have invented certain new and useful Improvements in Nut-Locks; and I do hereby declare the following to be a full, clear, and exact descri tion of the invention, such as will enable 0t ers skilled in the art to which it eppertains to make and use the some.

My invention relates to nut-locks; and its object is to provide means whereby a nut can be positively held against rotation. The invention consists of a nut having a series of beveled teeth radiating from the center thereof and ada ted to engage a lug formed on a spring'was 181 adapted to be interposed between the nut and the object against which the nut is adopted to be screwed.

The invention also consists of a base-plate having it series of, notches therein adapted to receive :1. lug oh he spring-washer, said baseplste havin projections for engaging the surface with lhich it contacts.

The invention also consists of the further novel features of construction and combinetion of parts, the preferred form whereof will be hereinafter more fully set forth, and pointed .out in the claims.

in the accompanying drawings i nave shown the preferred form of my invention.

In said drawings, Figure 1 is a view showing the nut-lock used upon a bolt connecting two woodenelements. Fig.2isaninnerelevetioii of the nut. Fig. 3 is a side elevation thereof. Figs. 4 and 5 are plan and edge views, respectively, of the spring-washer. Fig. 6 1s a face View of the base-plate, and Fig. 7 is a section on line a: 1;, Fig. 6. i

Referring to the figures by numerals of reference, 1 isanut,having a series of grooves 2. in one face which radiate from the center of said face and are adopted to be successively engaged by n. lug 5, carried by one of the spriug-urms 3, extending from one face of a Washer 4. Another spring-arm 3, hav ing a lug 5, extends downward .l'rom the washer, and said arms )refernbly extend about one-half the widti of the washer. as shown particularly in Fig. :3, and are formed by slitting the washer and disposing the free end of one arm at one side of the washer and the other arm at the opposite side of said washer, said arms being preferably thinner than the remainderof the washer to lend ai'lditional resiliency thereto. 'ihe lug 5 is adapted to engage any one of a series of notches 6, which are formed in one face of e. base-plate 7, said notches radiating from the center of the plate and the corners of said plate being offset to form lugs h. it will of course he understood that thebaseplate 7 has a central opening 9 therein for the reception of a bolt 10.

In using this nut-lock upon a bolt for connecting metallic devices the bolt is disposed through the metal parts and the wuslusr 4 interposed between the nut and the metallic devices, and by turning the nut in one direc tion the lug 5 will successively engage the reeesses or grooves 2 and the other lug 5 will bite into the metallic parts or a. groove, forumd therein in the path of the lug 5", (not shown,) and therefore hold the nut securely against rotation.

Where the nut-lock is used upon a bolt which extends-through a wooden element, as shown at 12 in Fig. l, l. utilize the lmse plate 7, because when the nut is tightened the lug 5" of washer 4 will project into one of the grooves 6 and the lugs 8 will be forced into the wood. it will thus be seen that the nut will be held against casual rotation. The nut may, however, be removed by placing a wrench thereon and turnin said nut backward, ti 3 arms I? being sufficiently resilient to permit the. lugs to 11love from groove to groove when the nut is rotated by force, although said arms are sufficiently rigid to hold said out against rotation under normal conditions.

it will be seen that the entire nut-look is very simple and inexpensive in construction and that it consists of but three parts, which when assembled constitute an eliicient means for preventing the unscrewing of a nut after the same. has been tightened upon a bolt.

\Vhat I claim is l. in a nut-lock, the combination with a spring-washer having slits therein and oppositely-extending nrms formed integral with the washer by said slitsv seid arms being of less width than the washer, :1. lug at the free end of each of said arms: of a nut lnrving radiating grooves in one face thereof. one of said lugs being adapted to be seated in any one of the grooves, and a base-plate having radiating grooves therein adapted to be en. gaged by the other luaz said plate having ofi'set portions constituting lugs for engaging the obj set against Which'it is forced.

2. The combination with a bolt of a basepiate surrounding the bolt and having radiating grooves therein, said plate having oflsetportions constituting lu s for engaging the ob'ect through Whi' h the wit is adapted to extend, a nut upon, the bolt having radiating grooves in one face, a spring-washer interposed between the plate and nut and surrounding the bolt, said Washer being slit to form oppositely-extending arms, and a lug seoured'to each of said arms adapted to be 15 respectively seated within the grooves of the nut and base-plate, said arms being of less. Width than the Washer.

In testimony whereof I have signed my name to this speeifioation'in the presenee of 20 tWo subscribing Witnesses.

OREN J. RUSSELL 

